Printed circuit board and method of producing the same

Abstract

According to one embodiment, a printed circuit board includes: a product portion having a given outer shape; and a cutout portion disposed in the given outer shape of the product portion, for being removed away in a later production step. The cutout portion comprises a test coupon including two signal terminals and two parallel wiring patterns meanderingly extended respectively from the two signal terminals.

1 . A printed circuit board, comprising:
 a product portion having an outer shape; and   a cutout portion disposed in the outer shape of the product portion, configured to be removed away in a later production step;   wherein the cutout portion comprises a test coupon comprising two signal terminals and two parallel wiring patterns extended respectively from the two signal terminals.   
   
   
       2 . The printed circuit board of  claim 1 ,
 wherein one of the two parallel wiring patterns comprises:   a plurality of linearly extended portions in which the one of the two parallel wiring patterns are linearly extended; and   a plurality of curvedly extended portions configured to connect adjacent two of the linearly extended portions.   
   
   
       3 . The printed circuit board of  claim 2 ,
 wherein the plurality of curvedly extended portions comprises an even number of sets of the curvedly extended portions.   
   
   
       4 . The printed circuit board of  claim 3 ,
 wherein one of the plurality of curvedly extended portions is in a semicircular shape.   
   
   
       5 . The printed circuit board of  claim 4 ,
 wherein the test coupon further comprises:   a basal-end linearly extended portion disposed on a basal-end side of the test coupon and linearly extended from at least one of the two signal terminals;   a terminal-end linearly extended portion on a terminal-end side of the test coupon;   a basal-end curvedly extended portion configured to connect the basal-end linearly extended portion with a first one of the linearly extended portions; and   a terminal-end curvedly extended portion curvedly extended to connect a second one of the linearly extended portions with the terminal-end linearly extended portion.   
   
   
       6 . The printed circuit board of  claim 5 ,
 wherein the test coupon comprises two grounding terminals.   
   
   
       7 . The printed circuit board of  claim 6 ,
 wherein the test coupon comprises a test coupon for measuring impedance.   
   
   
       8 . The printed circuit board of  claim 7 ,
 wherein the product portion printed circuit board is placed in a hard disk drive; and   the cutout portion is used for avoiding interference between a motor of the hard disk drive and the printed circuit board.   
   
   
       9 . A method of producing a printed circuit board, comprising:
 forming a print circuit board comprising a product portion and a cutout portion, the product portion comprising a wiring pattern and formed in an outer shape in a printed circuit board, the cutout portion comprising a test coupon having two parallel wiring patterns extending; and   cutting away the cutout portion from the printed circuit board to obtain the product portion.   
   
   
       10 . The method of  claim 9 , further comprising:
 performing a quality inspection on the printed circuit board by using the test coupon.